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vxresize - change the length of a volume containing a file system


/etc/vx/bin/vxresize [-bfsx]
[-F fstype] [-g diskgroup]
[-o {override|verify}] [-t tasktag]
volume new_length [[!]medianame...]


The vxresize command either grows or shrinks both the file system and its underlying volume to match the specified new volume length. The ability to grow or shrink is file system dependent. Some file system types may require that the file system be unmounted for the operation to succeed, as shown in the following table:


| | VxFS | UFS |


| Mounted FS |Grow and shrink| Grow only |


| Unmounted FS | Not allowed | Grow only |


The new_length operand can begin with a plus (+) or minus (-) to indicate that the new length is added to or subtracted from from the current volume length. Specify the new length, or change in length, in Veritas Volume Manager standard length units (see vxintro(1M)).

The vxresize command accepts the Intelligent Storage Provisioning (ISP) storage specification arguments that are used with the vxassist command, and other vxassist specification arguments such as mirror, stripe and alloc if the volume is not an ISP volume. The arguments are passed unmodified to the vxassist command.

For example, medianame operands can be specified to name the disks that are to be used for allocating new space for a volume. These arguments can be a simple name for a disk media record, or they can be of the form medianame, offset to specify an offset within the named disk. If an offset is specified, then regions from that offset to the end of the disk are considered candidates for allocation. If a medianame operand is prefixed by !, the specified storage is excluded from the allocation process.

See the vxassist(1M) manual pages for information about storage specification arguments.



Performs the resize operation in the background. The command returns quickly, but the resize will be in progress. Use the vxprint command to determine when the operation completes.

  Note    This option is only honored for grow operations on non-RAID5 volumes. Otherwise, it is ignored.


Forces a operation that is usually disallowed by vxresize.

-F fstype

Supplies the type of the file system to be resized.

-g diskgroup

Limits operation of the command to the given disk group, as specified by disk group ID or disk group name. The volume operand is evaluated relative to the given disk group.


Requires that the operation represent a decrease in the volume length.

-t tasktag

If any tasks are registered to track the progress of the operation, mark them with the tag tasktag. The tag specified by tasktag is a sequence of up to 16 alphanumeric characters.


Requires that the operation represent an increase in the volume length. Fail the operation otherwise.

Hardware-Specific Options

Some environments provide guidelines to optimize VxVM's interaction with intelligent storage systems. If these guidelines are present, VxVM follows the guidelines when creating volumes or allocating space for volumes. By default, vxresize only resizes volumes such that the volumes conform with these guidelines. The following options change the behavior of vxresize:

-o override

Resizes the specified volume and ignores any storage-specific guidelines. Overriding the guidelines is not recommended as it can result in incompatible objects, or objects that cannot be administered by VxVM and any associated software that exploit storage-specific features.

-o verify

Verifies that the specified volume can be resized without violating any storage-specific guidelines, but does not resize the volume. If any guidelines are violated, vxresize exits with an error message.

  Note    These options need a specific license. Without the license, vxresize ignores the specified option.


For a CFS file system, the vxresize command must be executed on the master node, which must also be the CFS primary.


fsadm_vxfs(1M), vxassist(1M), vxintro(1M), vxprint(1M), vxtask(1M)

Veritas Volume Manager Administrator's Guide
Veritas Storage Foundation Intelligent Storage Provisioning Administrator's Guide